Answer: progressivejazz

AnswerCrossword Clue
PROGRESSIVEJAZZDave Brubeck's specialty
PROGRESSIVEJAZZExperimental, dissonant music genre named by Stan Kenton
PROGRESSIVEJAZZSpecialty of Brubeck, Shearing, et al.
PROGRESSIVEJAZZStan Kenton's music
PROGRESSIVEJAZZMusic for reformists?